Slotting-machine tool-holder.



PATBNTED DEG. 1, 190s. J. ARMSTRONG & s. WELTER.

SLOTTING MACHINE T001. HOLDER.

APPLICATION FILED MAY 29, 1903.

N0 MODEL.

A TTON x No. 745,758. Patented December 1, 1903.

UNITED STATES PATENT OFFICE.

JOHN ARMSTRONG AND SAMUEL VELTER, OF CHICAGO, ILLINOIS, ASSIGNORS IO ARMSTRONG BROS. TOOL CO., A CORPORATION OF ILLINOIS.

SLOTTlNG-MACHINE TOOL-HOLDER.

SPECIFICATION forming part of Letters Patent No. 745,758, dated December l, 1903.

Application filed May 29, 1903. Serial No. 159,224. (No model.)

To all whom t may concern.- j usted that its point will extend past or, if Be itknown that we, .I OHN ARMSTRONG and desired, at least to the lower edge or bottom SAMUEL WELTER, citizens of the United of the block 1l. States, and residents of Chicago, county of In order to permit of the rocking of the 55 5 Cook, and State of Illinois, have invented cerblock 11, which is shown in the drawings as tain new and useful Improvements in Slotrectangular, the pivot-pin 13 passes thereting-Machine Tool-Holders, of which the folthrough near the rear upper corner thereof, lowing is a specification, and which are illusas clearly shown in Fig. 3, the lower end of trated in the accompanying drawings, formthe shank 12 providing, as at 16, an abut- 6o 1o ing a part thereof. ment against which the block bears when This invention relates to improvements in the cutter is on its downward stroke. rlhe tool-holders for slotting-machines, and has upper face of the block 11 at the corner adparticular reference to that type in which the jacent the pivot-pin 13 is beveled, as at 17, cutter is carried by an oscillating member deto enable the block to move, and the lower 65 15 signed to provide a relief motion for the tooly face of said block is beveled, as at- 18, for the on the back stroke of the same. same reason.

The invention consists in the combination Passing horizontally through' theblock 11 and arrangement of parts hereinafter fully is an aperture 19, which enters the diagonal described, particularly designated in the opening in which the cutter 10 is seated. In 7o y zo claims, and illustrated in the accompanying the forward end of the aperture 19 is seated drawings, in whicha clamping-pin 20, the face thereof adjacent Figure 1 is a front elevation of the toolthe cutter being beveled, so as to conform to holder of our invention. Fig. 2 is a side elethe inclination of the adjacent face of the tool A vation of the same. Fig. 3 is a vertical lonof the cutter, and this pin is forced forward 75 gitudinal section, on an enlarged scale, on the against the cutter, so as to hold the same by line .fr of Fig. 1; and Fig. 4 is a detail of the means of a bolt or screw 21. The pin 20 is oscillating cutter-holder. provided with a recess on one face through The cutter 10 is secured in an oscillating which passes a pin 22 to hold the pin 2O from member or block 11, pivoted at the lower end falling out when the cutter 10 or bolt 2l is 8o 3o of a cylindrical shank or stem 12. The block removed.

11, as shown, is mounted on a pin 13, the The lower side of the pin 2O is given a slight ends of which are tted into depending arms curvature at the ends in order to permit the or extensions 14 at the lower end of theshank pin a slight rocking movement. When the 12 and which are connected bya tie or bridge cutter 10 is clamped in position by screwing 85 piece 15. It is to be noted that the extendown the screw 21, the pin 2O impinges the sions 14 forma housing for the block 11 and cutter and is slightly tilted thereby. Upon that the tie-piece 15 strengthens the housing releasing the screw 21 and giving the cutter and provides a firm support for the block 11. 10 a tap at its forward end the pin 20 will Tools of this character having an oscillating readily release its grip and resume its normal 9o 4o relief-blockusuallyhave the cutters arranged position. I horizontally. This is objectionable, inas- In order to strengthen the lower wall of the much as when the edge of the cutter is loaperture 19 to better resist the pressure due cated above the lower edge of the block it is to the cutter-clamping device, a projection impossible to get down to the bottom of the or extension 23 is provided at the corner of 95 slot to be formed. To avoid this and to prothe block adjacent and under the front end vide means whereby the same cutter may be of the tool, and the rear face of this extension used to operate to the full depth of a slot, the is inclined, as at 24, and bears when the block cutter is in the present instance mounted so is depressed againstacorrespondingly-shaped y 1' as to pass diagonally across or through its face at the forward end of the tie-piece 15. 10o

5o carrying-block, its edge projecting down- The projection 23 also serves as a guard to wardly, and then the cutter may be so adprevent chips from slipping or being thrown rearwardly from the cutter into the space between the bottom of the block 1l and the tie l5 and interfering with the free movement of the block.

Seated in sockets in the upper face of the block l1 and back of the pivot-pin 13 are expansion-springs 26, such springs reacting against the lower face of the shank 12 to thrust the cutting-tool forward.

The shank 12 is clamped between two sets of blocks 27. Passing through coinciding apertures in the adjacent ends of the blocks 27 are bolts 28, provided with squared heads 29, which are seated in a pair of horizontal T- grooves 30 on the front face of a slide 31. The rear of each of the pairs of blocks 27 is provided with a shoulder 32, which bears against opposite walls of the T-grooves. The outer ends of the bolts 28 are provided with nuts 33, and it will be readily understood that when such nuts are screwed home the blocks 27 will be clamped to the slide 31 and at the same time the stern 12 will be securely clamped between the blocks 27.

Vertical and lateral adjustment of the tool is attained by unloosening the nuts 33, at which time the blocks 27 may be moved laterally and the shank 12 adjusted vertically.

In order to prevent the shank falling out from between the blocks 27 when the nuts 33 are loosened, a collar 34 is provided and located on the stem above the upper pair of clamping-blocks 27. If it be desired to adjust the cutter so as to cut to a certain depth, the collar 34, which is provided with a bolt 35 for clamping it to the shank, may be loosened and adjusted to the proper position. Then when the nuts 33 are unscrewed the shank will drop down, but be held in the desired position by the collar 34, resting on the upper pair of clamping-blocks 27.

'mar/s The cutter may be adjusted angularly simply by releasing the nuts 33 and turning the stem. Motion is imparted to the slide 31 in the usual manner.

In the operation of the tool on the down stroke of the slide the springs 26 press the block 11 outwardly, moving its upper face against the abutment 16 and thrusting the cutting-tool forward. On the upstroke of the slide the block retreats, yielding to the pressure against the work on the tool, and thereby permitting the tool to be retracted without exerting appreciable pressure against the surface being operated on.

We claim as our invention- 1. In combination, a shank having an aperture opening transversely through its body and prolonged laterally at one end through the shank end; a tool-holding block located within the aperture and extended at its forward end into the lateral extension thereof and having a tool-socket disposed obliquely as to the axis of the shank and opening at its forward end through the extension of the block; and a pivot-pin securing the block to the shank and located back of the tool-socket and adjacent the rearward end thereof.

2. In combination, a shank, an oscillatable block carried by the shank and having a diagonal aperture and a horizontal opening entering the aperture through the rear face of the block, a tool seated in the aperture, apin in the opening having an inclined face engaging the tool, such pin being curved on its under face at the ends, and a screw entering the aperture and bearing against the pin.

' JOHN ARMSTRONG.

SAMUEL WELTER. In presence 0f- PAUL ARMSTRONG, MAY V. MICHAUD. 

